a05f7892-f7be-7506-e044-00144fdd4fa6engutf8datasetdataset - Thematic MapGeoscience Australia+61 2 6249 9966+61 2 6249 9960GPO Box 378CanberraACT2601Australiasales@ga.gov.aupointOfContact2015-03-23ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata1.1http://www.ga.gov.au/metadata-gateway/metadata/record/70459/Potential for magmatic uranium systems in Australia Map 1: Intrusive-related2011publication70459Schofield, A.authorIntrusive-related U mineralisation constitutes only a small proportion of Australia's known U resources despite the widespread occurrence of U-rich intrusive igneous rocks across both time and space. Due to this apparent discrepancy, the potential for intrusive-related U systems has been assessed on a continental scale using a GIS-based approach. This approach focuses on identifying those units or magmatic events which are the most favourable for the presence of magmatic-related U systems. Thus, the results do not necessarily identify likely locations of mineralisation, but rather are intended to form the basis for area selection and detailed follow-up work. This map uses surface geology, and therefore no information is given of the potential for these systems undercover.
This map applies a mineral systems approach to assessing the potential for intrusive-related U systems, which is translated into mappable geoscientific criteria. The mineral systems model has three components: (1) melt generation; (2) U concentration; and (3) U deposition. Prospectivity criteria for melt generation (1) are the distribution of peralkaline or high temperature, high halogen I- or A-type melts, and the distribution of felsic igneous rocks. U concentration (2) is facilitated by fractional crystallisation, which is quantified using Rb/Sr, and exhibits itself in elevated U or high field strength element contents. U deposition (3) is mapped using U2/Th radiometric anomalies.
The 'fuzzy logic' method is used to combine the disparate prospectivity criteria developed. The result gives an indication of the potential prospectivity on a scale of 0 to 1. The study has confirmed the favourability of already known U provinces, such as the Curnamona Province of South Australia and the Pine Creek region of the Northern Territory. However, new potential has been highlighted in regions not currently well-known for intrusive-related U mineralisation, such as the Arunta, Halls Creek and northern Musgrave regions.
Note that the potential indicated here does not include other 'hybrid-style' systems, which may also have a genetic association with igneous rocks, such as the Olympic Dam IOCG-U deposit.Commonwealth of Australia (Geoscience Australia)ownerCommonwealth of Australia (Geoscience Australia)02 6249 996602 6249 9960Cnr Jerrabomberra Ave and Hindmarsh DrGPO Box 378CanberraACT2601Australiasales@ga.gov.aucustodianasNeededThematic Mapmineral explorationthemeEarth SciencesAustralian and New Zealand Standard Research Classification (ANZSRC)2008-03-31+11:00publicationAustralian Bureau of Statistics (ABS)http://www.abs.gov.au/ausstats/abs@.nsf/Latestproducts/1297.0Main%20Features32008?opendocument&tabname=Summary&prodno=1297.0&issue=2008&num=&view=owner9780642483584otherRestrictionslicenselicenseotherRestrictionsCreative Commons Attribution 4.0 International Licenceunclassifiedengutf8geoscientificInformation110.0156.0-44.0-9.0pdfUnknownjpgUnknownGeoscience Australia+61 2 6249 9966+61 2 6249 9960GPO Box 378CanberraACT2601Australiasales@ga.gov.audistributoronLinehttp://www.ga.gov.au/corporate_data/70459/70459.jpgWWW:DOWNLOAD-1.0-http--download70459.jpgDownload the file (jpg) [4 MB]downloaddatasetUnknownunclassified